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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 6 |
| 5 | 31 |
| 6 | 1 |
| 7 | 27 |
| 8 | 598 |
| 9 | 12714 |
| 10 | 1 |
| 11 | 112 |
| 12 | 10118 |
| 13 | 872744 |
| 14 | 74451015 |
| 15 | 1 |
| 16 | 453 |
| 17 | 164591 |
| 18 | 56998275 |
| 19 | 19510862790 |
| 20 | 6659538174846 |
| 21 | 1 |
| 22 | 1818 |
| 23 | 2646161 |
| 24 | 3669008040 |
| 25 | 5027706837390 |
| 26 | 6869479371212196 |
| 27 | 9379110782727354118 |
| 28 | 1 |
| 29 | 7279 |
| 30 | 42396780 |
[1,1,1,1,6,31,1,27,598,12714,1,112,10118,872744, 74451015,1,453,164591,56998275,19510862790, 6659538174846,1,1818,2646161,3669008040, 5027706837390,6869479371212196, 9379110782727354118,1,7279,42396780] |